Combined drill and thread-cutter.



H. MAGKEY. COMBINED DRILL AND THREAD GUTTER.

APPLICATION FILED SEPT. 23, 1911.

Patented J all. 14, 1913.

3 SHEETS-SHEET 1.

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COLUMBIA PLANOGRAFH C04, WASHINGTON, D. C.

Ill MACKEY. COMBINED DRILL ANDv THREADOUTTER. APPLICATION FILED SEPT.23, 1911.

1,050,152. Patented Jan. 14,1913.

3 SHEETS-SHEET 2.

@Mm M4/MJ e] Hozneq COLUMBIA PLANOGRAPH Ca., WASHINGTON, D. c.

H. MAGKEY.

COMBINED DRILL AND'THRBAD GUTTER.

APPLIGATION FILED SEPT. 2S, 1911. 1,050,152, Patented Jan. 14,1913.

3 SHEETSSHEET 3.

Summa/to@ @wmf @I donau? COLUMBIA PLANDGRAPH c0..W^smNG1on. D. c,

I-IIIILIARD MACKEY,

OF LAMAR. MISSISSIPPI.

COMBINED DRILL AND THREAD-CUTTER.

Specification of Letters Patent.

Patented Jan. 14,1913.

Application filed September 23, 1911. Serial No. 650,893.

To all vif/wm t may concern Be it known that I, HILLIARD MAGKEY, acitizen of the United States, residing at Lamar, in the county of Bentonand State of Mississippi, have invented new and useful Improvements inCombined Drills and lln-ead-Cutters, of which the following is aspecification.

The invention relates to a combination drill and thread critter' andmore particularly to the class of self-feeding drills and thread cuttingmachines,

The primary object of the invention is the provision of a machine inwhich a vise for centering the work is capable of adjustment toward andaway from the drill or operating tool the latter being automatically fedfor threading and t-apping metal bolts, pins and the like, and which mayalso be used as a nutting tool.

Another object of the invention is the provision of a machine of thischaracter in which the drill or operating tool may be driven atdifferent speeds.

A further object of the invention is`the provision of a machine of thischaracter, which is simple in construction, readily and easily operated,thoroughly reliable and eilicient in it-s operation and inexpensive inmanufacture.

lith these and other objects in view the invention consists in theconstruction, combination, and arrangement of parts, as will behereinafter more fully described, illustrated in the accompanyingdrawings and pointed out in the claim hereunto appended.

In the drawings: Figure 1 is a side elevation of a machine constructedin accordance with the invention. Fig. 2 is a front elevation thereof.Fig. 3 is a fragmentary, vertical, longitudinal sectional view throughthe machine. Fig. 11 is a top plan view. Fig. is a sectional view on theline 5 5 of Fig. 2. Fig. 6 is a transverse, sectional view through thechangeable gearing for driving the machine taken on the line 6-6 of Fig.2. Fig. 7 is a plan view of a work table for attachment in the vise.Fig. 8 is a vertical, longitudinal, sectional view through tool holder.Fig. 9 is a side elevation of a tapping tool. Fig. 10 is a plan view ofa thread cutting die.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawings.

Referring to the drawings by numerals the machine comprises a base orsupport 10, same adapted to be secured in any suitable manner to avertical wall or other stationary part and has fixed thereto a bracket11 which is cut away at its free edge to provide gaps or recesses 12, 13and 14C respectively, the said free edge of the bracket being formedwith independent sleeves 15, 16, 17 and 18 respectively which are spacedapart by the recesses in the bracket. Formed in the bracket 11rearwardly of the sleeve 17 is a bearing 19 in which is journaled adriving` shaft 20 on one end of which is fixed a iy or belt wheel 21,the same being disposed at one side of the bracket while on t-heopposite end of the shaft are fixed small and large gears 22 and 3()respectively. the gear 22 being engaged with a gear 23 loosely journaledupon a stud spindle 21 mounted in an off-set bearing 25 formed on thesleeve 17, while the gear 30 is adapted to mesh with a gear 29 formedwith a hollow hub 28 telescoped upon a tubular extension 26 formedcentrally on the gear 23, the hub 28 being loose upon the tubularextension 2G so that the gear 29 may be revolved thereon when meshing.with the gear 30. The hollow hub 28 of the gear 29 is formed with a handcrank 28 whereby the machine may be manually operated. The gear 23 inits outer face is formed with a hollow 29 of a size corresponding to thegear 29 for receiving the same when the hub 28 is slid inwardly on theextension 2G and projecting into this hollow 29 is a locking lug 30adapted to mesh with the teeth on the gear 29, thereby locking thelatter to the gear 23 after said gear 29 is disengaged from the gear 30,so that the gears 22 and 23 will operate together thereby driving themachine at a diiferent speed than when the gears 29 and 30 are meshingwith each other.

The gear 23 is formed with beveled crown teeth 31 meshing with a beveledgear 32 splined or otherwise keyed to a drill or other tool shaft 33which is slidably and rotatably mounted in the sleeves 17 and 18 on thebracket, it being evident that by reason of the gear 32 being splined orkeyed to the said shaft 33 the latter may freely slide through the gearfor the longitudinal adjustment thereof in the sleeves 17 and 18 of thebracket. The outer end of the shaft y 33 is formed with a chuck 34L inwhich is adapted to be engaged a drill or a tool holder presentlydescribed.

Mounted on the inner end of the shaft 323 is a swivel nut 35, in whichis loosely engaged the head 3G of a feed screw ST, the same beingthreaded in a rotatable shaft or spindle 3S journaled within the sleeves15 and 1G, the said shaft or spindle 38 being provided with a feed wheel39 keyed or otherwise secured thereto, and which is disposed within therecess 1Q between the sleeves 15 and 1G. Thus it will be seen that uponrot-ation of the feed wheel Si), the shaft 38 will be rotated, so thatthe feed screw 55T will telescope within the saine or move outwardlythereof for the advance ment of the drill or other tool shaft 31%, thepinion upon the latter shaft being located within the recess let, and inthis manner is prevented from displacement laterally upon the drill ortool shaft as said pinion abuts against the sleeves 17 and '1,8 disposedat opposite sides thereof.

Formed in the vertical wall of the recess 13 is a vertical guide groove10, in which is engaged the inner end of a holding pin Ll1 which ispassed through the feed screw 3T, the outer end of the said pin beingformed with a hand grip L1-2; thus, in this manner it will be seen thatthe pin Z.t1 engaged in the groove 110 will prevent the rotation of thefeed screw 37 during the longitudinal displacement thereof.

Surrounding the drill or other tool. shaft 33 is acoiled expansionspring e3, one end of which hasl its bearing against the swivel nut 35,while its opposite end has its bearing against the adjacent end of thesleeve 1T, the spring being designed to assist in 'the lifting` of thedrill or other tool shaft 33, when the drill or tool carried thereby isbeing retracted from the work.

Formed on the bracket and projecting laterally therefrom at one sidethereof, is a bearing ear L14, to which pivoted, as at 45, a rockinglever L16, the lower end of which is foi-ined with an inturned nose L17adapted to Contact with and travel over a waved earn swell 48 formedconcentrically about the said axle 24 on one side of the cog gear 23,the upper end of the lever t6 being provided with a gravitating ratchetpawl 419 which is connected thereto by means of a pivot 50, the pawlbeing adapted to engage ratchet teeth 51 formed on the upper face of thefeed wheel, so that on the rolation of the cog gear :23, the lever 46will be rocked, thereby causing the feed wheel to rotate for actuatingthe feed screw 37, thus advancing the drill or other tool carried by thedrill or other tool shaft toward the work to be operated upon.

Threaded in the bracket 11 is an adjustable winged screw 52 which isarranged in ing lever L1G, thus limiting` the rocking movement of thesaid lever L1-6 in one direction, it being understood that by adjustmentof the winged screw the throw of the. lever in one direction may beincreased or decreased, as desired. Spaced from the upper end of thelever and formed thereon is a bearing lug 54, with which is engaged oneend of an expansion spring 55, the opposite end of which has its bearingagainst the bracket 11, the spring being designed to positively hold thenose 41T of the lever L16 in contact with the cani swell for the properactuation of the feed wheel 39 which in turn operates the drill or othertool shafty 323 of the machine.

Fixed to the base 10, at a point below the bracket 11, is a bearing 5G,in which is engaged one end of a vertical guide post 57, the oppositeend of which is engaged in a socket 5S formed in the bracket 11, andslid ably connected with this post 5T is a suplriorting arin 5t)carrying a centering vise, presently described.

The centering vise comprises a pair of coacting ja or clamping membersGO and (31, respectively, the jaw G1 being formed with a collar (52surrounding the supporting arrn 39 and carries a locking lever (33 whichis adapted to engage the supporting arni for locking the collar 62 yinadjusted position upon the arin. The aw (30 is formed with a shank 611slidably engaged in the jaw 61, the shank being provided with the usualadjusting screw 65, whereby the jaws may be brought together or opened,as desired,

'for theclainping and centering of work to be operated upon by the drillor other tool.

Journaled in the bracket 11 and the bearing 5G spaced from and inparallel relation to the guide post 57, is a feed screw GG, the upperend of which is provided with a pin ion (37 suitably fixed thereto andmeshing with a gear 68 ournaled upon a stud spindle G9 fixed in thebracket 11 at right angles to the feed screw, the gear 68 being providedwith a hand crank 70, so that upon the turning of the latter the screwwill be rotated.

Projecting laterally frein the collar G2 on the jaw 61 is an internallythreaded lug T1 which engages the feed screw GG, whereby on the rotationof the latter, the vise will be raised and lowered upon the post 57,thereby bringing the work into proper position to be operated upon bythe drill or other tool. Adapted for detachable connection in the chuck311- on the drill shaft 33 is a tool holder, comprising a hollowcylindrical body 72, the saine being fornied at one end with a stein 73which is adapted to be engaged in the chuck 34, and held fast therein,while the opposite end of the body is foi-'ined with a dished circularhead 74:, in the side wall of which are threaded milled alinement with alug 53 foi'nied'on the rockl binding screws 75, whereby a screw cuttingdie 7G may be secured therein, it being understood that varying sizedthread cutting dies may be employed.

In lieu of the tool holder, a tapping tool 77 may be secured in thechuck 34 for the cutting of threads in a nut or other part.

Should it be desired to operate upon iiat work, there is provided asuitable work supporting table 7S which is of the ordinary well-knownconstruction, and is adapted to be inserted in the vise, whereby workmay be held upon the table to be operated .upon by a drill or othertool.

From the foregoing, taken in connection with the accompanying drawings,it is thought that the construction and operation of the invention willbe readily understood, without requiring a more extended explanation.

WThat is claimed is A machine of the class described, comprising asupport having spaced alining sleeves, a tool supporting shaft rotatablymounted in a pair of said sleeves, a pinion fixed to said shaft, adriving shaft journaled 25 said stud sha-ft and meshing with said pin-30 ion and having crown teeth engaging the smaller gear ot' the drivingshaft, the said beveled gear being provided with a recess in its outerface, a huh projecting centrally and outwardly from the recess, a gearslid- 35 able on to said hub and movable into and out of the recess fordisengagement from. and engagement with the larger gear on the drivingshaft and mechanism operated upon.

by the beveled gear for feeding the tool 4o supporting shaft-in onedirection.

In testimony whereof I aiix my signature 1n presence of two witnesses.

HILLIARD MACKE Y.

lVitnesses F. D. HANDLE, J. O. TYsoN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Yatents, Washington, D. C.

